Comparative study of Cd addition effects on precipitation in different aluminium alloys

This work demonstrates that Cd microadditions can enhance the precipitation of age-hardening precipitates in 2xxx and 6xxx alloys as well dispersoid 3xxx alloys, but have a minimal effect on 7xxx alloys. Experimental theoretical methods are utilised to investigate nucleation precipitates/dispersoids Cd-containing Al The enhanced θ′ α-dispersoids respectively, proposed result from heterogeneous earlier-formed Cd-rich nanoparticles, while β′′ is attributed increased number density effective Mg-Si co-clusters due incorporation. investigation provides basis for design precipitation-strengthened via microalloying.